Malicious PDF — malware analysis report

Static analysis result for SHA-256 54fce0a20d5eed2e…

MALICIOUS

PDF

34.4 KB Created: 2021-06-20 21:00:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e88d0f0f59be712761ce124d47e1ccb7 SHA-1: ba9d681ede208be60e435e4d26ce4efe71ce8749 SHA-256: 54fce0a20d5eed2eb3e3218455fb84ca608da6004498e2b1fa9959627fcb86e8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary redirector URL is http://netcdn.co/app/431946152/howto-get-free-robux-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/howto-get-free-robux-2021-game-hack In PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/how-to-get-free-robux-grayphiny_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/tiktok-free-like-2021_GM835599320.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/rbx-free_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/roblox-hacks-download-free-pc_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F92 22024 bytes
SHA-256: e43da50839838d08115dc9144c12d7d203143ec0cd1d82ac0778f02f2aebda3d
font_01_sfnt_off00006053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6053 19384 bytes
SHA-256: 11d66e14ff5b7680bda295eb12630c03300495b4336e390734dee516715fb390

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